Begin autotools sanitization sequence by requiring ports to explicitly
specify which version of {libtool,autoconf,automake} they need, erasing
the concept of a "system default".
For ports-in-waiting:
USE_LIBTOOL=YES -> USE_LIBTOOL_VER=13
USE_AUTOCONF=YES -> USE_AUTOCONF_VER=213
USE_AUTOMAKE=YES -> USE_AUTOMAKE_VER=14
Ports attempting to use the old style system after June 1st 2004 will be
sorely disappointed.
bit better, and allow different lisp compilers to be used. The clisp
compiler dumps core, so mark that case as an error until it can get
fixed. Fix the COMMENT a bit to fit in with sysinstall better.
OK'ed by: portmgr(marcus)
